mumbrauer



W. MUMBRAUER.

DOOR LOCK.

APPLICATION FILED MAYIs. Isla.

Patented Dee. 2,1919.

2 SHEETS-SHEET i.

WIK-MM (MNM Afro/I Us g Doon-Loox,

To all whom t may concern:

Be it/known that I, WiLLIAM a citizen of the United States, and resident of the borough -of the Bronx, city and-.State of New .Yorin-have invented certain `new and useful .Improvements Y in Door-Locks,Y of which the following is a specification.

vThis invention relates to door .closures and has for an .object toprovide a-n improved bolt which willlbe readily released undery certain conditions.

'I he invention provides afbolt adapted for use uponl emergencyexit doors of theaters, churches, factories, and thelike.

This application is in part 'a continuatioi'iV of applications, Serial No. '268,448 led` Deceinber 27, 1918,- andr Serial'No. 268,449, filed December 27, 1918K. e

`Referring to the accompanying drawing forming part-hereof,vand in which -I- have shown an illustrative embodimentk of the invention: Y Y f Figure 1 is a horizontal, sectional view of abolt constructed in accordancel with'the invention 'appliedto'a double door.. The dotted lines show the leavesof the door in partly opened position; g Y

Fig. 2 is an rvenlarged view ofi-the device, the left-hand leaf, Lwhich carries fthe keeper, being shown in its final position.V and' the lright-hand leaf which carries the bolt being shown inclosing position;` f

Fig. V3 isa .view in elevation, the parts being Ashown in thegsame Vposition as Vin Fig.2;

Fig. 4 is a section taken. on line 4 4, Fig. 2, `showing' theiparts in locked relation;

Fig. 5 is alsectionftaken on the same. line showing the parte inv unlocked relation;

,Fig., Gis an invertedIongitudinal section .takenl onV lineV 6,-6, Fig..4;

y of a portion 0f th devi Fig. 5;

"K Fig- 7fis a vvertical Y p 'ce takenonfli'ne 7 f- 7 FigzwSp-is ra .section on-'lineAS-f-VS, 7

Fig. 9' is apartial view'of. the casingand hefbolt; certain partsbeing omitted, taken Fig. 10 is a plan "View showinga bolt constructed in accordance with the inventlon- .applied to asingle door.

The Abolt construction shown the purprises a lIlg' ,the

- l speiat'iyon @metiers raten.

MUMBRAER,

',holdinglpower vof the devicef The ybracket longltudiri'ialfV sectionV v 1 Batentennec. 2, '1919. I r V Application filed :May 13,1919. Serial No'. 296,804." l r .l

leasingl means-arranged touunloclz the bolt y uponbeing pressed toward the door 1.

v Referring to Fifsblftof) 1n. which the device "is yillustratedfas applied: to a .double d0or,1the;boltflv is carried by one. door. leaf, I6j) 2, and is projectedxagainst; a keeperj carried by theljcom'pa'nion .door leaf ;4 inI such manner thatrthe .thrust ofithefbol-tfagainst the keeper tends to prevent .outward movement; of the idoorleaves. Thebolt-xis Sposi'- *tionedA to engage;thekeeper` ata point olf- .setinwardly from a, line connecting they two hinges vso that ,the bolt exerts fa considerable fOlCe t0 hold thedoorj leaves in closed position. As shown, theQ-bolt consists o f a tube '.6 in the forward end-,0f which'is secured a bracket` 9 is .lon`ger than-ifthe .bracket 10: :to position the keepenengaging end Aofthe bolt. away from the doOrs'thereby-toincrease'the v lOfis formed to close theendr of the casingV and provide an abutment *.11 .forV a compresion spring Ll2 which vnormally, holds the bolty ,inprojected',positionf..y v

Thelooking means l'shown' consists oa lr35 Y sleeve 14 rotatably;mountednponfthe ca'sing, providedwwith ranaupstanding lug or handle. 15 and'havingjlocking connection"l with the bolt 1 throughatransverse slot-16 lin the casing .by means ofapin 17 secured' to -Ithe lockingsleeve andprojected inwardly through the 1 slot 16 Tand yinto f. a Vbayonet slot '.18 in the bolt.. `The transverseportionfof 'the bayonet slot maybe made'f'wider than the pin to provide a limitedfreedomxof` movement .of the boltwvhen locked. Whenthey locking pin 17;is..in the vouterend o f the transverse:V portion of the'bayonet sloty asf in thegposltion of parts shownin Figs.

4-and 6, the boltis .looked against retraction Y.;

(butrwhen the vpin is inthe inner end of the .transverse portion" and in line-with" thev longitudinal Vportion yof the bayonet slot, asoccursv whenthesleeve handle 15 is pushed toward the doorfa's in.y the .positionof parts `shown in,Figs.5land 9, the. bolt may be retracztedV by .pressure longitudinally against In [operati n, .the v` Ilocking ,member 'iv be mend@lloeliitfaa' ealkipgfpasitiee member rotatable on the casing, means on said member for locking and unlocking lsaid bolt in its advanced position, and a stop on the second leaf, which is adapted to operatively engage the Working end of the bolt, land to retract said bolt at the* opening of the door. n v

7. Al device of the character described comprisingl a casing, a bolt slidable therein, a sleeve aXially rotatable 'on vthe casing and. having locking engagement with said bolt to hold the same in projected position, and a releasing member operable by pressure thereagainst tov release said bolt, substantially as described. l

8. A device of the characterv described comprising a slotted casing disposed at an angle to the face of the door, a spring bolt slidable therein, a sleeve co-axialwith andy axially rotatable on the casing connected with said bolt through a slot inthe `casing and operative to lock'the bolt in projected position.

9. In a the combination with a pair of door leaves of a keeper secured to one door leaf, a bolt carried bythe other door leaf and projected longitudinally against said keeper, and codevice ofthe character described,

my hand.

operating thereWithvWhen in projected posil tion to hold the door leaves in closed relation, and means operative to hold the bolt in projected position to holdzthe doorleaves in Aclosed relation but operative upon pressure thereagainst toward the door toA permit l retraction ofthe bolt and opening of the door leaves, substantially as, described.

10. In a devicev of the characterl described, in combination, a bolt, a support in which said bolt is slidablyjmounted, a locking member mountedon said support and movable in a plane transverse tosaid bolt to hold said bolt in operative position, a releasing member mounted on said support for movement independently of the bolt and locking member in aplane transverse to said bolt-v and operable to release the locking member. s

11. In a device of the` character described,

the combination with ardoor of` a bolt carriedy thereby, a locking member carried by said door Aand movable in a plane transverse to said bolt to locksaid bolt inoperativeposition and a releasing member movable in a plane transverse to saidbolt'op'erative When moved in one direction to release said bolt and movable in the opposite direction independently of the bolt and locking. member andinoperative when so moved-to lock said bolt. i

In testimony whereof I have WILLIAM MUMBRAUER. 7

hereunto set` 1 

